need help solving this solution I know that the formula is (Budget Price-Actual Price)*Actual Quantity but im confused whether quantity is bags or kg?

Q . \"4| 1 1 11:11. '1: .. Cole Laboratories makes and sells a lawn fertilizer called Fastgro. The company has developed standard costs for one bag of Fastgro as follows: Standard Standard mm W Direct material 20 kilograms $8.00 Direct labour 0.1 hours 1.10 The company had no beginning inventories of any kind on Jan. 1. During January, the following activity was recorded by the company for the actual performance: 0 Production of Fastgro: 4,000 bags 0 Direct materials purchased: 85,000 kilograms at a cost of $32,300 0 Direct labour worked: 390 hours at a cost of $4,875 0 Inventory of direct materials on Jan. 31: 3,000 kilograms 12. What was the direct material purchase price variance for January? a. $40 F. 1). $1640 F. 0. $1600 F. (1. $1600 U. 6. None of the above